Experimental investigation of CRC-BRB under cyclic load

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Braced frames are widely used as a lateral load resisting system in steel buildings. The proposed research deals**with a new type of buckling restrained bracing (BRB) where the steel core is supported by unbonded crumb**rubber mortar (CRM) encased in fiber reinforced plastic (FRP) sleeve. The advantage of such a bracing system**is that it will not buckle like the conventional concentric bracing system and will have much lower weight**compared to regular BRBs. Currently, there are no guidelines for manufacturing and designing such bracing**and such braced frame structures. The objective of the proposed research is to experimentally investigate the**behavior of braces. Performance of this structural element under axial cyclic loading tests will be evaluated to**determine its hysteretic behavior.**Performance-based design is becoming a standard practice for seismic design and evaluation of structures in**order to achieve a reliable and satisfactory level of performance. However, there has been no study on the**seismic performance of such braced frame structures and their elements. This research will help develop proper**understanding and knowledge about the behavior of CRM-BRB, which will eventually help us determine the**seismic performance of such braced frames. This study will assist engineers in examining the interaction**among different components of the whole braced frame system under lateral loads, and evaluate its collapse**behavior, and determine adequate section sizes and connection details. Finite element method (FEM) will also**be implemented in this study where the models of piston brace will be generated in FEM environment. This**model will be first validated with the experimental results of the brace. This study will provide**performance-based design solutions for such braced frame building structures and their elements for the**industries. The significance of this research is paramount as it directly contributes to the safety and security of**Canadian steel building infrastructure against large lateral loads like earthquakes.